mclean



rah-620,245. Patented Feh.,2',-|99.

, J. McLEAN.

PAssENG'l-:n ELEvATon.

(Application led Nov. 2, 1897.)

Bra E la ATTORNEY.

No. 620,245. Patented Feb. 28, |899.

.l. McLEAN.

vPASSI-:milan ELEvATon.

(Application led Nov. 2, 1897.) (No Model.)

2 Sheets-Sheet 2.

Hl l f 7E, '/0 E 'ATTOHNEK UNITED STATES PATENT OFFICE.

JOHN MCLEAN, OF NEW YORK, N. Y.

i P'AssENGER-ELEVATOR.

'SPECIFIGATION forming part of neteersraeent No. 620,245, dated February2s, 189e. Application led November Z, 1897. Serial No. 657,155. (Nomodel.)

To all whom it may concern,.-

Beit known that I, JOHN MCLEAN, a citizen of the United States, residingin the city of New York, in the county and State of New York, haveinvented a certain new and useful Improvement in Passenger-Elevators, of

which the following is a specification.

The improvement relates to safety devices for elevators. One 'device insuccessful use for this purpose consists in shoes secured at each sideof the car and below the bottom thereof, each of these shoes beingprovided with an inclined way, making a wedge-shaped recess between theshoe and the contiguous guide-rail of the elevator-way. A roller in eachshoe is adapted to be raised so as to be jammed in the wedge-shapedrecess by means operated through a lever system at the top of the car,controlled by supplemental suspending cables or cords, which exert apull when the main cables break. I have provided further means forraising said rollers, comprising an additional roller-lifting rod ateach side, connected by small cords with theV main or lifting cables,provisions being made for'also lifting the jamming-roller by hand from apoint within the car when desired.

The accompanying drawings form a part of this specification andrepresent what I consider the best means for carrying out the invention.g

Figure l is afront elevation of the car and immediately-adjacent partswith a portion broken away. This igure also indicates parts at the topof the building. Fig. la is a view, on an enlarged scale, of theequalizingblock, parts representing the top parallel bars of the carbeing broken away to illustrate more clearly the connection of saidblock with the car. Fig. 2 is a partial plan view of the car andappurtenances. The remaining figures are on a larger scale. Fig. 3 is anedge view, and Fig. 4 a face view, of one of the roller-containing shoesand immediately-related parts, a portion of the latter figure being-broken away to more clearly illustrate the operation of the roller inconnection with the contracting-space of the shoe. Fig. 5 is a view ofthe upper portion of one of the roller-lifting rods with an attachedspring and certain connections. Fig. 6 is a detail view illustrating anexisting lever system for operating the wedging-rollers, and Fig. 7illustrates the provisions for actuating the auxiliary wedges from thegovernor at the top of the well or way.

Similar letters of reference indicate corresponding parts in all thefigures Where they appear..

A indicates the rigid perpendicular guiderails, which perform theirusual functions. They are of the usual T form to presentinwardly-extending vertical ribs or flanges A'.

B is the car.

O is the ordinary equalizing-block presented by the parallel plates CC', transversely connected by the horizontal pin c, upon which is hungthe head c of the neck extension of a yoke C2, the depending members O3of which are turned outward to take under a pair of parallel bars B B',bolted thereto and which rigidly span the top of the car, as indicatedin Fig. 2.

D D D D are four hoisting-cables attached to the inner and outer ends ofcentrally-pivoted levers C4 C2100-ated between the plates C at eitherside of the central pin c. This is the well-known arrangement forequalizing the suspending tension of the cables D under varyingconditions.

I use a well-known arrangement of ily-ball governor F, gearing with ahorizontal shaft F at the top of the Well or way. This shaft carries asheave or sheaves F2, around which .and corresponding sheaves (notshown) at the bottom of the well or way pass wire ropes G.Well-understood lever and dog devices f are designed to be thrown lintoaction to clamp onelof the wire ropes G upon the rise of thegovernor-balls due to an abnormal increase of speed in the car. One runof each wire rope G is attached to the free end of a horizontal lever H,the other end of which is pivotally mounted on a transverse shaft B2, acoiled spring H being provided to normally hold said lever in ahorizontal position, but permitting a limited upward movement thereof.Obviously this disposition of the parts actuates the shaft F andgovernor through the motions of the car.

A shoe B3, rigidly secured on each side of the car, has a bearing orpurchase portion B4 IOO lying in front of the contiguous flange A' andat the rear thereof an inverted triangular block B5. A triangular wedgeBis supported in operable relation to the block through its dependingconnection with the lever I-I above, so that the lifting of the latter,due to the clamping of the wire rope G by the governor devices, willraise and jam the wedge between the block and rail-flange A' and operateto arrest the car.

I I are strong shoes rigidly secured to the bottom of the car at eachside and embracing the anges A'. Each shoe has a rear bearing portion I'and a front-roller-receiving recess I2 of the contracted shape indicatedby the dotted line t' in Fig. 4. There is a rod J at each side of thecar rising and sinking therewith and'terminating at its lower portion ina Iiattened hook J', which engages a roller or movable piece K in thecontracting-recess of the adjacent shoe. The vertical portion of thehook has a diagonal slot J 2, receiving a screw I3, projecting from theshoe to positively guide the vertical movement of the hook over the faceof the shoe.

The rods J extend to the top of the car, where they connect with theouter ends of the levers L L, which form members of a lever systemlocated at the top of the car and including shorter pivoted levers L'L', to the inner ends of which vertical links M M are attached, whichdepend from a head M', suspended by auxiliary cables N, attached to thecar-counterbalance.

As will be seen from an inspection of Figs. l, 2, and 6, rupture ofthemain suspendingcables will throw the suspending strain upon theauxiliary cables N to such an extent as to lift the inner ends of thelevers L' and move the levers L, elevate their outer ends, raise therods J with their hooks, and lift the rollers K to wedge them in thenarrow portions of the shoe-recesses against the rail-flanges. Theperipheries of the rollers are preferably serrated to promote theirbiting action. Reduction of strain on the auxiliary cables N will tendto lower the hooks and release them.

O O are slender cords attached to the main hoisting-cables D above thecar. Their lower ends converge and are attached to the bight of a cordP, which is held loosely between two sheaves B7 B7 and extendshorizontally therefrom across the top of the car, running at each sideover the sheaves BB B8 and thence downward, terminating in a hook, or,more properly, a bent eyebolt P'. The eyebolt P' is secured by a nut P2in engagement with the fiat portion of a spring-depressed rod Q,somewhat similar in purpose and arrangement to the rod J. This rod Q, asshown in Figs. 3 and 4, is located between the shoe I and the rod J, sothat its hook Q' is necessarily in intimate relation with the roller Kand can lift the latter without any corresponding movement of the rod JThere is an additional eyebolt R engaged in the dat portion of each rodQ and connecting with another cord S, which extends up, running over thesheave B9 on the car, thence across the same, preferably in proximity tothe cable P, next over the sheave B9 at the opposite side, then descendsand connects with the corresponding eyebolt R at the opposite side. Thecord S has a sharp bend or bight at its mid-length like the other, butinstead of extending vertically it extends horizontally toward the frontof the car, being supported near the bight of two horizontal sheaves B10B10. (See Figs. l and 2.) A horizontally-extending cord T is attached tothe bight of this cord and runs on a sheave B11 at the top of the car atits front, and thence down, and terminates in a ring T', to beconveniently pulled by the attendant to exert traction on the cord S andeffect the raising of the rods Q at both sides, elevation of the rollersK, and jamming of the car.

It will be seen that in addition to the regular provision for operatingthe triangular wedges when the speed becomes excessive and the means forjamming the rollers to arrest the car upon the breaking of the mainsuspending-cables I have provided auxiliary devices for raising therollers K either automatically, as represented by the cord connection Owith the main cables, if any one of said cables should break between thepoint of cord connection and the equalizing-block C, or conveniently byhand, as represented by the cords S and T. Thus should the regularsafety appliances for any reason fail to act the attendant can rely uponboth the additional automatic and the hand-controlled devices forstopping the car.

I claim as my inventionl. The combination in an elevator,of guiderails,a cage or car having shoes loosely embracing the guide-rails and eachcontaining a movable piece K serving wedgewise between the shoe andguide-rail, the governor-controlled rod .I and spring-depressed rod Q,1ocated in juxtaposition to and engaging the piece K, the rod Q beingoperable independently of the rod J, and connections extending to thecar or cage for operating the rod Q, substantially as herein specified.

2. The combination in an elevator,of guiderails, a cage or car havingshoes loosely embracing the guide-rails and each containing a movablepiece K serving wedgewise between the shoe and guide-rail, thegovernor-controlled rod J and spring-depressed rod Q located injuxtaposition to and engaging the piece K, the rod Q being operableindependently of the rod J, and connections extending therefrom to thehoisting-cables and to means within the car operable by the attendant,substantially as herein specified.

3. The combination in an elevator, of guiderails, a car or cage havingshoes loosely embracing the guide-rails and each containing a movablepiece, a hooked rod J, for lifting the piece K and operable by an upperlever system controlled by the main cables, and an IOO additional rod Qalso for lifting the piece K, but operable independently of the rod J,substantially as herein specified.

4. The combination in an elevator, of guiderails, a ear or cage havingarresting provision governor devices located at the top of the Well orWay, for operating said provision shoes on the car loosely embracing theguiderails and each containing a movable piece K for serving Wedgewisebetween the car and rail, a hooked rod J for lifting the piece K, andoperable by an upper lever system con trolled by the main cables, and anadditional rod Q, also for lifting the piece K, but operableindependently of the rod J, substantially as herein specified.

5. The combination infan elevator,of guideence of two witnesses.

JOHN MCLEAN. Witnesses:

J. B. CLAUTICE, M. F. BoYLE.

